The extra letters from the word search are....
ABHOESFAEMGTMREOCCDMCFTFAGSJRSYDEGRKPHUEGARNNRMCYOPMGGFRONTIERSMENANDFURTRADERSFJTSECEN
VGYLECUVOIBUPPLETSDIMYMCOTLZKNX......
So the Treasure answer (haha, I'm going to keep calling it a Pillar...) is Frontiersmen and Fur Traders